Machine Safety

Machine Safety July 1, 1998

Copper’s Not the Only Way to Network

You have to install a new manufacturing data network. Before you call for a truck-load of twisted-pair copper wire, better check out all the applications. There may be areas where copper won't work.There are other choices. Fiber-optic technology is not new, but is becoming easier to use. Radio frequency is moving from warehouse data collection to sensors and networking.

By Gary A. Mintchell, Control Engineering
Machine Safety May 1, 1998

Millennium problem risks control system safety

Concern about the "millennium computer bug" and its implications for safety-related computer control systems prompted the U.K. Health and Safety Executive (HSE) to commission research last year on the nature and extent of the problem, and ways of tackling it. In the report, Safety and the Year 2000, David Eves, HSE's deputy director general, says, "No one who reads ...

By Staff
Machine Safety May 1, 1998

Industrial networks promote ease of use

Industrial networks proponents at NMW emphasized ease of use and other attributes at exhibits and a concurrent FieldComms International (Mooresville, N.C.) conference.ControlNet International's (Coral Springs, Fla.) Bill Moss explained that industrial users should use ControlNet, rather than Ethernet, including media redundancy, intrinsic safety, determinism, and sch...

By Staff
Machine Safety May 1, 1998

Honeywell joins U.S. machine safety markets

Honeywell's Micro Switch Division recently entered the machine safety market with a broad product portfolio. The new product families include safety control modules, safety mats, solenoid key-operated safety interlock switches, and a miniature safety interlock switch. Honeywell Micro Switch has supplied safety products in Europe since 1982 and has already adopted Eu...

By Staff
Machine Safety March 1, 1998

High Density IS Modules

Durham, U.K.—Series HiD 2000 provides control system builders with the means to cut the number of cabinets needed for interfacing to hazardous areas. Four channels may be packed into an 18-mm wide plug-in module, compared to the one or two channels common today. Further space savings are gained by the range of termination boards for mounting modules which incorporate loop-disconnect ter...

By Staff
Machine Safety March 1, 1998

Recorders Offer Something for Everybody

What functionality and/or features are today's recorder users seeking? How are they applying recorders? Are paperless recorders replacing traditional paper recorders? Are ink recorders more popular than thermal recorders? Do people order more single-channel than multichannel recorders?To find out the answers to these and other questions, Control Engineering conducted original market res...

By Staff
Machine Safety February 1, 1998

PLCs Aren’t Just Older, ‘They’re Better’

What functionality/features are today's programmable logic controller (PLC) users seeking? How are they applying PLCs? Is any other technology, such as personal computers, taking away market share from PLCs? Control Engineering wanted to know, so we asked a random sampling of 1,500 readers to participate in a survey about today's PLC.

By Staff
Machine Safety January 1, 1998

Connect to the Benefits of Digital Industrial Networks

More users, system integrators, and manufacturers of control hardware and software are realizing the benefits of digital networks at the sensor, device, and fieldbus levels.In this kickoff of the "Year of the Network" series, Control Engineering asked leaders associated with 12 major industrial networks to reveal growth projections, ideal applications, views on standards, and future out...

By Mark T. Hoske, Control Engineering
Machine Safety July 1, 1997

Intrinsic safety protects your plant against explosions

Explosions can be prevented by limiting the amount of electrical energy available in hazardous areas or by containing the situation using bulky, heavy devices called 'explosion-proof enclosures.' Limiting excess electrical parameters such as voltage and amperage (current) requires the use of energy-limiting devices known as 'intrinsically safe (IS) barriers.' Explosion-proof enclosures prevent or control explosive situations with brute force. They are heavy containers designed to hold an explosion inside. Electrical devices within explosion-proof enclosures can operate at normal power levels.

By Henry M. Morris